Unit 3 Lessons 1 -3 Inequalities, interval notation

Select all the inequalities.

• 4x - 5 = 5

• 9x < 3

• $3\le4x-9$

• $3\ne5$

• $\frac{3}{2}x+\frac{2}{5}=2$

When writing an inequality in interval notation, which symbols represent equal to?

• $\ge$

• [ ]

• ( )

• $\le$

When writing an inequality in interval notation, which symbols represent not equal to?

• $\ge$

• [ ]

• ( )

• $\le$

 $Write\ \left(-\infty,5\right)\$  as an algebraic inequality.

•  $x>5$  

•  $x<5$  

•  $x\ge5$  

•  $x\le5$  

 $Write\ \left[-2.4\right)\$  as an algebraic inequality.

•  $-2>x<4$  

•  $-2<x\le4$  

•  $-2\le x<4$  

•  $-2\le x\le4$  

 $Write\ x>6\ in\ interval\ notation.$  

•  $\left(-\infty,6\right)$  

•  $\left(6,-\infty\right)$  

•  $\left[-\infty,\ 6\right)$  

•  $\left(6,\ \infty\right)$  

 $Write\ 3\ \le\ x\ \le\ 9\ in\ interval\ notation$  

•  $\left(3,9\right)$  

•  $\left[3,9\right]$  

•  $\left[3,\ 9\right)$  

•  $\left(3,9\right]$  

Can you use the symbols [ or ]
with infinity?

• Yes
• No

Tags

CCSS.6.EE.B.8

When writing a solution in interval notation, what brackets do i use for:

> or <

• [ ]

• ( )

When writing in interval notation, what kind of brackets do I use for:

or ≤ or ≥

• [ ]

• ( )